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Micro-scale urbanization-based risk factors for dengue epidemics.

Pei-Sheng Lin^1,2, Wei-Liang Liu³, Chaur-Dong Chen⁴

¹Institute of Population Health Sciences, National Health Research Institutes, 35 Keyan Road Zhunan, Miaoli County, 350, Taiwan. pslin@nhri.edu.tw.

International Journal of Biometeorology

|November 10, 2023

Summary

Urbanization creates micro-scale risk factors, like mosquito-larvae-positive ditches and "dengue lanes," that drive dengue epidemics. Addressing these environmental factors is crucial for controlling mosquito-borne diseases.

Keywords:

Climate variables Dengue epidemics Dengue risk factors Mosquito habitats Positive ditches Urbanization

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Area of Science:

Environmental Science
Public Health
Epidemiology

Background:

Dengue is a rapidly spreading mosquito-borne viral disease, predominantly in urban and semi-urban areas.
Urbanization and associated environmental changes create potential risk factors for dengue transmission.
A lack of systematic studies on micro-scale urbanization-based risk factors for dengue epidemics exists.

Purpose of the Study:

To investigate micro-scale environmental risk factors associated with urbanization and their link to dengue spread.
To analyze spatial and spatial-temporal correlations between urbanization characteristics and dengue case clustering.
To examine the relationship between meteorological variables and environmental risk factors for dengue.

Main Methods:

Study conducted in Kaohsiung, a densely populated city in southern Taiwan.
Analysis of micro-scale environmental factors: ditches positive for mosquito larvae and closely packed streets ('dengue lanes').
Application of statistical methods for spatial and spatial-temporal data analysis.

Main Results:

A positive correlation was found between urbanization-associated environmental risk factors and dengue case clustering.
Mosquito-larvae-positive ditches were significantly associated with the occurrence of 'dengue lanes'.
Rainfall and temperature were related to positive ditches, with temperature showing a greater effect on dengue.

Conclusions:

Micro-scale urbanization factors, specifically ditches and street configurations, are significant risk factors for dengue epidemics.
Environmental modifications and urban planning regulations are essential for mitigating dengue spread.
Findings are directly applicable to policymakers for developing targeted interventions against mosquito-borne diseases.